| Wikidata property for an identifier | Q19847637 |
| Wikidata property for an identifier that does not imply notability | Q62589320 |
| Wikidata property related to online communities | Q30041186 |
| P2264 | Mix'n'match catalog ID | 3942 |
| P3254 | property proposal discussion | https://www.wikidata.org/wiki/Wikidata:Property_proposal/Archive/25#P1482 |
| P1896 | source website for the property | https://stackoverflow.com/tags/ |
| P8966 | URL match pattern | ^https?:\/\/stackoverflow\.com\/(?:questions\/tagged|tags)\/([A-Za-z0-9]+) |
| ^https?\:\/\/([A-Za-z0-9](?:[A-Za-z0-9\-]{0,61}[A-Za-z0-9])?)\.stackexchange\.com\/(?:questions\/tagged|tags)\/([A-Za-z0-9]+) |
| P2429 | expected completeness | always incomplete | Q21873886 |
| P2302 | property constraint | format constraint | Q21502404 |
| distinct-values constraint | Q21502410 | ||
| allowed qualifiers constraint | Q21510851 | ||
| allowed-entity-types constraint | Q52004125 | ||
| property scope constraint | Q53869507 | ||
| P1659 | related property | hashtag | P2572 |
| Stack Exchange site URL | P6541 | ||
| P1629 | Wikidata item of this property | Stack Exchange | Q3495447 |
| Stack Exchange Folksonomy | Q30337063 |
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